Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa

Steve W. Lindsay; Musa Jawara; Julia Mwesigwa; Jane Achan; Nabie Bayoh; John Bradley; Balla Kandeh; Matthew J. Kirby; Jakob Knudsen; Mike Macdonald; Margaret Pinder; Lucy S. Tusting; Dan J. Weiss; Anne Wilson; Umberto D’Alessandro

doi:10.1038/s41598-019-43816-0

Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa

Steve W. Lindsay, Musa Jawara, Julia Mwesigwa, Jane Achan, Nabie Bayoh, John Bradley, Balla Kandeh, Matthew J. Kirby, Jakob Knudsen, Mike Macdonald, Margaret Pinder, Lucy S. Tusting, Dan J. Weiss, Anne Wilson, Umberto D’Alessandro

Vector Biology

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

In The Gambia, metal-roof houses were hotter during the day than thatched-roof houses. After 24 h, the mortality of Anopheles gambiae, the principal African malaria vector, was 38% higher in metal-roof houses than thatched ones. During the day, mosquitoes in metal-roof houses moved from the hot roof to cooler places near the floor, where the temperature was still high, reaching 35 °C. In laboratory studies, at 35 °C few mosquitoes survived 10 days, the minimum period required for malaria parasite development. Analysis of epidemiological data showed there was less malaria and lower vector survival rates in Gambian villages with a higher proportion of metal roofs. Our findings are consistent with the hypothesis that the indoor climate of metal-roof houses, with higher temperatures and lower humidity, reduces survivorship of indoor-resting mosquitoes and may have contributed to the observed reduction in malaria burden in parts of sub-Saharan Africa.

Original language	English
Article number	7770
Pages (from-to)	e7770
Journal	Scientific Reports
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41598-019-43816-0
Publication status	Published - 23 May 2019

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Lindsay, S. W., Jawara, M., Mwesigwa, J., Achan, J., Bayoh, N., Bradley, J., Kandeh, B., Kirby, M. J., Knudsen, J., Macdonald, M., Pinder, M., Tusting, L. S., Weiss, D. J., Wilson, A., & D’Alessandro, U. (2019). Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa. Scientific Reports, 9(1), e7770. Article 7770. https://doi.org/10.1038/s41598-019-43816-0

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title = "Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa",

abstract = "In The Gambia, metal-roof houses were hotter during the day than thatched-roof houses. After 24 h, the mortality of Anopheles gambiae, the principal African malaria vector, was 38\% higher in metal-roof houses than thatched ones. During the day, mosquitoes in metal-roof houses moved from the hot roof to cooler places near the floor, where the temperature was still high, reaching 35 °C. In laboratory studies, at 35 °C few mosquitoes survived 10 days, the minimum period required for malaria parasite development. Analysis of epidemiological data showed there was less malaria and lower vector survival rates in Gambian villages with a higher proportion of metal roofs. Our findings are consistent with the hypothesis that the indoor climate of metal-roof houses, with higher temperatures and lower humidity, reduces survivorship of indoor-resting mosquitoes and may have contributed to the observed reduction in malaria burden in parts of sub-Saharan Africa.",

author = "Lindsay, \{Steve W.\} and Musa Jawara and Julia Mwesigwa and Jane Achan and Nabie Bayoh and John Bradley and Balla Kandeh and Kirby, \{Matthew J.\} and Jakob Knudsen and Mike Macdonald and Margaret Pinder and Tusting, \{Lucy S.\} and Weiss, \{Dan J.\} and Anne Wilson and Umberto D{\textquoteright}Alessandro",

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Lindsay, SW, Jawara, M, Mwesigwa, J, Achan, J, Bayoh, N, Bradley, J, Kandeh, B, Kirby, MJ, Knudsen, J, Macdonald, M, Pinder, M, Tusting, LS, Weiss, DJ, Wilson, A & D’Alessandro, U 2019, 'Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa', Scientific Reports, vol. 9, no. 1, 7770, pp. e7770. https://doi.org/10.1038/s41598-019-43816-0

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T1 - Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa

AU - Lindsay, Steve W.

AU - Jawara, Musa

AU - Mwesigwa, Julia

AU - Achan, Jane

AU - Bayoh, Nabie

AU - Bradley, John

AU - Kandeh, Balla

AU - Kirby, Matthew J.

AU - Knudsen, Jakob

AU - Macdonald, Mike

AU - Pinder, Margaret

AU - Tusting, Lucy S.

AU - Weiss, Dan J.

AU - Wilson, Anne

AU - D’Alessandro, Umberto

PY - 2019/5/23

Y1 - 2019/5/23

N2 - In The Gambia, metal-roof houses were hotter during the day than thatched-roof houses. After 24 h, the mortality of Anopheles gambiae, the principal African malaria vector, was 38% higher in metal-roof houses than thatched ones. During the day, mosquitoes in metal-roof houses moved from the hot roof to cooler places near the floor, where the temperature was still high, reaching 35 °C. In laboratory studies, at 35 °C few mosquitoes survived 10 days, the minimum period required for malaria parasite development. Analysis of epidemiological data showed there was less malaria and lower vector survival rates in Gambian villages with a higher proportion of metal roofs. Our findings are consistent with the hypothesis that the indoor climate of metal-roof houses, with higher temperatures and lower humidity, reduces survivorship of indoor-resting mosquitoes and may have contributed to the observed reduction in malaria burden in parts of sub-Saharan Africa.

AB - In The Gambia, metal-roof houses were hotter during the day than thatched-roof houses. After 24 h, the mortality of Anopheles gambiae, the principal African malaria vector, was 38% higher in metal-roof houses than thatched ones. During the day, mosquitoes in metal-roof houses moved from the hot roof to cooler places near the floor, where the temperature was still high, reaching 35 °C. In laboratory studies, at 35 °C few mosquitoes survived 10 days, the minimum period required for malaria parasite development. Analysis of epidemiological data showed there was less malaria and lower vector survival rates in Gambian villages with a higher proportion of metal roofs. Our findings are consistent with the hypothesis that the indoor climate of metal-roof houses, with higher temperatures and lower humidity, reduces survivorship of indoor-resting mosquitoes and may have contributed to the observed reduction in malaria burden in parts of sub-Saharan Africa.

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DO - 10.1038/s41598-019-43816-0

M3 - Article

SN - 2045-2322

VL - 9

SP - e7770

JO - Scientific Reports

JF - Scientific Reports

IS - 1

M1 - 7770

ER -

Reduced mosquito survival in metal-roof houses may contribute to a decline in malaria transmission in sub-Saharan Africa

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